脱醇型透明RTV硅橡胶的制备与性能研究  

Preparation and Properties of Dealcoholated Transparent RTV Silicone Rubber

作　　者：曾祥雷 张少鸿 邓丽华 胡新嵩 ZENG Xiang-lei, ZHANG Shao-hong, DENG Li-hua, HU Xin-song(Research Center of Guangdong Adhesive and Sealing Materials （Glorystar） Engineering,Guangzhou Glorystar Chemical Co. Ltd., Guangzhou 510450, Guangdong)

机构地区：[1]广州市高士实业有限公司,广东省粘结密封材料(高士)工程技术研究中心,广州510450

出　　处：《有机硅材料》2018年第5期373-376,共4页Silicone Material

基　　金：广州市科技计划项目资助(201807010095)

摘　　要：向烷氧基封端107硅橡胶中加入交联剂、气相法白炭黑、锡催化剂等,制得脱醇型透明单组分室温硫化硅橡胶,考察了交联剂用量、催化剂种类和用量对硅橡胶储存稳定性的影响,以及偶联剂种类对粘接性和表干时间的影响。结果表明较佳的制备条件为向100份烷氧基封端107硅橡胶中添加4份甲基三甲氧基硅烷、9份气相法白炭黑、1. 2份自制复合偶联剂、0. 6份硅氮烷、0. 3份锡配合物催化剂。此条件下制得的硅橡胶综合性能较佳,拉伸强度为1. 35 MPa,拉断伸长率为173%,表干时间为9 min;经100℃×5 d储存后,硅橡胶拉伸强度为0. 51 MPa,表干时间为60 min,完全硫化时间为2 d。The dealcoholized transparent RTV-1 silicone rubber was prepared by adding crosslinker, fumed silica and tin catalyst in alkoxyl terminated 107 silicone rubber. The effects of the amount of crosslinking agent, the types and amount of catalyst on the storage stability of silicone rubber, and the types of coupling agent on adhesion and surface drying time were investigated. Results showed that the optimum preparation conditions are as follows： adding 4 phr of methyltrimethoxysilane in 100 phr of alkoxy terminated 107 silicone rubber, adding 9 phr methyl trimethoxy silane in 100 phr of alkoxy terminated silicone rubber, 90 phr of fumed silica, 1.2 phr of self-made composite coupling agent, 0.6 phr of silane, 0.3 phr of tin complex. The silicone rubber prepared under the conditions has better comprehensive properties, whose tensile strength is 1.35 MPa, and the elongation at break is 173%, the surface drying time is 9 min. After storage for 100℃×5 d, the tensile strength of silicone rubber is 0.51 MPa, the surface drying time is 60 min, and the complete vulcanization time is 2 d.

关 键 词：烷氧基封端 室温硫化 脱醇型 透明 

分 类 号：TQ333.93[化学工程—橡胶工业]